Doctor Who: 10 Clever Moments Of Foreshadowing You Probably Missed

The Twelfth Doctor's adventure with Ashildr in The Woman Who Lived basically consisted of these two immortals discussing why eternal life sucks. Well, to be fair, it's Ashildr who does the bulk of the complaining, constantly reminding the Doctor that all the mortals around them will eventually die. How cheery.

In describing the inevitable loneliness that faces them both, Ashildr tells the Doctor that the people around him - drawing specific attention to Clara - will "blow away like smoke", which sounds like an unusually particular way to describe someone's passing.

And that's because it is.

Flash-forward a few episodes to Face The Raven, and Clara has reached the end of her life at the claws of the titular bird. When it strikes her, she lets out an enormous scream of pain, and what pours out of her mouth a few seconds later? That's right - a cascade of thick, black smoke, almost like her life force is leaving her body.

It's not an easy clue to pick up on in the moment, but Ashildr's description of mortality beautifully foreshadows Clara's heartbreaking demise.